WO2013016930A1 - Procédé pour la réduction du courant horizontal dans de l'aluminium liquide dans une cuve d'électrolyse d'aluminium - Google Patents

Procédé pour la réduction du courant horizontal dans de l'aluminium liquide dans une cuve d'électrolyse d'aluminium Download PDF

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Publication number
WO2013016930A1
WO2013016930A1 PCT/CN2011/084507 CN2011084507W WO2013016930A1 WO 2013016930 A1 WO2013016930 A1 WO 2013016930A1 CN 2011084507 W CN2011084507 W CN 2011084507W WO 2013016930 A1 WO2013016930 A1 WO 2013016930A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon block
current
steel bar
aluminum
reducing
Prior art date
Application number
PCT/CN2011/084507
Other languages
English (en)
Chinese (zh)
Inventor
李旺兴
杨建红
邱仕麟
张艳芳
王跃勇
侯光辉
Original Assignee
中国铝业股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国铝业股份有限公司 filed Critical 中国铝业股份有限公司
Publication of WO2013016930A1 publication Critical patent/WO2013016930A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/16—Electric current supply devices, e.g. bus bars

Definitions

  • the invention relates to the technical field of electrolytic cells, in particular to a method for reducing the horizontal current of aluminum liquid in an aluminum electrolytic cell. Background technique
  • the technical problem to be solved by the present invention is to provide a aluminum electrolytic cell aluminum which can make the current distribution in the aluminum liquid more uniform, reduce the horizontal current in the aluminum liquid, and is beneficial to the stable, high-efficiency and long-life operation of the large aluminum electrolytic cell. Liquid level current method.
  • the present invention provides a method for reducing the horizontal current of an aluminum liquid in an aluminum electrolytic cell, and laying a partial current conduction in a cathode carbon block, or a steel rod, or a connecting material thereof, or a phosphorus pig iron.
  • the material causes the current in the aluminum liquid to be relatively uniformly hooked into the cathode carbon block, and exits from the side of the electrolytic cell through the steel rod.
  • the invention provides a method for reducing the horizontal current of an aluminum liquid in an aluminum electrolytic cell, which can effectively change the yin
  • the pole resistance distribution adjusts the cathode current distribution to reduce the horizontal current in the aluminum liquid, increase the magnetic fluid stability of the electrolytic cell, and improve current efficiency and tank life.
  • FIG. 1 is a schematic view showing the structure of a first embodiment of the present invention.
  • Embodiment 2 is a schematic diagram of the structure of Embodiment 2 of the present invention.
  • FIG. 3 is another schematic diagram of the structure of Embodiment 3 of the present invention.
  • Figure 4 is a cross-sectional view of Figures 2 and 3 of the present invention.
  • Figure 5 is a top plan view of Figures 1, 2, 3 of the present invention.
  • FIG. 6 is a schematic diagram of a structure of a third embodiment of the present invention.
  • FIG. 7 is another schematic diagram of the structure of Embodiment 3 of the present invention.
  • Figure 8 is a cross-sectional view of Figures 6 and 7 of the present invention.
  • Figure 9 is a top plan view of Figures 6 and 7 of the present invention.
  • FIG. 10 is a schematic diagram showing the structure of Embodiment 4 of the present invention.
  • FIG. 11 is another schematic diagram of the structure of Embodiment 4 of the present invention.
  • Figure 12 is a cross-sectional view of Figures 10 and 11 of the present invention.
  • FIG. 13 is a schematic diagram of Embodiment 5 of the present invention. detailed description
  • the invention provides a method for reducing the horizontal current of the aluminum liquid in the aluminum electrolytic cell, and laying a part of the current guiding material 3 at the cathode carbon block 1 or the steel rod 2 or its connecting material cathode paste or phosphorus pig iron 4, so that the cathode resistance is from the inner side Gradually increasing outside, the current in the aluminum liquid is relatively uniform and enters the cathode carbon block, thereby achieving the purpose of reducing the horizontal current of the aluminum liquid.
  • the method for reducing the horizontal current of the aluminum liquid in the aluminum electrolytic cell will be described in detail below in conjunction with the specific embodiments of the present invention and the accompanying drawings.
  • a flow guiding material is laid between the cathode carbon block and the steel rod, and the current guiding material 3 can be laid in various ways as needed.
  • a thin layer of current-conducting material 3 is laid between the blocks of carbon block 1 and steel rod 2 without changing the carbon block and steel rod structure, or first combined with steel rod 2.
  • the current guiding material 3 may be one or more materials having a resistivity greater than that of the carbon block, or
  • the non-continuously laid insulation material is placed on the outer 1/3 or 2/3 of the carbon block 1 as needed to increase the cathode resistance of the section and reduce the current throughput, thereby reducing the horizontal current in the aluminum liquid. .
  • a flow guiding material 3 is laid between the cathode carbon block and the steel rod, and the current guiding material 3 can be laid in various ways as needed.
  • a thin layer of current-conducting material 3 is laid between the blocks of carbon block 1 and steel rod 2 without changing the carbon block and steel rod structure.
  • the current guiding material 3 may be a material or an insulating material having a resistivity greater than that of the carbon block, and is laid between the carbon block 1 and the steel rod 2, and the length of the flow guiding material may be changed from the head of the steel rod as needed.
  • the position or position in the middle begins to lay out to the steel rod and the electricity is aligned with the edge of the carbon block.
  • the upper surface of the steel bar completely covers the width of the steel bar.
  • the side portion is gradually widened from the inside to the outside, or is stepped wide; the widest portion can be the same width as the steel bar, or smaller than the width of the steel bar.
  • the inward width gradually increases as shown in Fig. 2 and Fig. 3; the cathode resistance of the corresponding section of the flow guiding material is gradually increased, and the current throughput is adjusted, thereby reducing the horizontal current in the aluminum liquid.
  • the current-conducting material 3 is embedded in the carbon block to replace a portion of the steel rod.
  • a material having a lower electrical resistance than the steel rod is used to replace the upper end of the inner end of the steel rod.
  • the height of the corresponding steel bar material 2 under the flow guiding material 3 gradually increases from the inside to the outside until the height of the steel bar at the flow guiding material 3 is no longer changed.
  • the closer the cathode is to the internal resistance the more the conductivity inside the cathode is increased, so that the current in the aluminum liquid is more evenly distributed, and the horizontal current in the aluminum liquid is reduced.
  • the current-conducting material 3 is embedded in the bottom of the carbon block to replace a portion of the carbon block material to form a combined cathode carbon block.
  • the current guiding material 3 can be made of a conductivity material different from the original carbon block, and is equal in width and length to the original carbon block, and is combined with the carbon block at the bottom of the carbon block by a slope or a stepped interface as shown in Figs.
  • the flow guiding material 3, the inner and outer thick thickness of the flow guiding material 3 and the inner thick outer thin carbon block material will be combined; the cathode carbon block resistance is gradually increased from the inside to the outside. Reduce the external current throughput, thereby reducing the horizontal current in the aluminum liquid.
  • a cathode carbon block can be formed by combining two or more carbon block materials having different resistivities, and the resistivity is gradually increased from the inside to the outside, so that the current flows into the steel bar material through the cathode carbon block.

Abstract

L'invention porte sur un procédé pour la réduction du courant horizontal dans de l'aluminium liquide dans une cuve d'électrolyse d'aluminium, comprenant : la mise en place d'une pièce de matériau conducteur de courant au niveau d'un bloc cathodique en carbone, ou d'une barre d'acier, ou d'une pâte cathodique de matériau de connexion de celui-ci, ou de fonte brute au phosphore; et l'opération consistant à faire en sorte que le courant présent dans l'aluminium liquide entre dans le bloc cathodique en carbone de façon égale, passe dans la barre d'acier et sorte d'une partie latérale de la cuve d'électrolyse. Le procédé de la présente invention change la distribution de résistance au niveau de la cathode, ajuste la distribution de courant au niveau de la cathode, réduit le courant horizontal dans l'aluminium liquide, améliore la stabilité du fluide magnétique présent dans la cuve d'électrolyse, améliore le rendement en courant et allonge la durée de vie utile de la cuve.
PCT/CN2011/084507 2011-08-04 2011-12-23 Procédé pour la réduction du courant horizontal dans de l'aluminium liquide dans une cuve d'électrolyse d'aluminium WO2013016930A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201110221902 CN102234820B (zh) 2011-08-04 2011-08-04 一种减少铝电解槽铝液水平电流的方法
CN201110221902.4 2011-08-04

Publications (1)

Publication Number Publication Date
WO2013016930A1 true WO2013016930A1 (fr) 2013-02-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/084507 WO2013016930A1 (fr) 2011-08-04 2011-12-23 Procédé pour la réduction du courant horizontal dans de l'aluminium liquide dans une cuve d'électrolyse d'aluminium

Country Status (2)

Country Link
CN (1) CN102234820B (fr)
WO (1) WO2013016930A1 (fr)

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US9371593B2 (en) 2012-09-11 2016-06-21 Alcoa Inc. Current collector bar apparatus, system, and method of using the same
NO20141572A1 (no) * 2014-12-23 2016-06-24 Norsk Hydro As En modifisert elektrolysecelle og en fremgangsmåte for modifisering av samme

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CN102234820B (zh) * 2011-08-04 2013-03-20 中国铝业股份有限公司 一种减少铝电解槽铝液水平电流的方法
CN102560540B (zh) * 2011-12-09 2015-02-11 云南铝业股份有限公司 一种磷生铁浇铸阴极组装炭块
CN104451777A (zh) * 2013-09-25 2015-03-25 贵阳铝镁设计研究院有限公司 一种电解槽上阳极的配置方法
CN105350018A (zh) * 2015-11-25 2016-02-24 中国铝业股份有限公司 一种燕尾槽型铝电解槽用阴极
US11242604B2 (en) 2016-07-26 2022-02-08 Cobex Gmbh Cathode assembly for the production of aluminum
CN108221002A (zh) * 2017-12-06 2018-06-29 中国铝业股份有限公司 一种铝电解用磷生铁浇铸阴极的组装方法
CN109763145A (zh) * 2019-03-07 2019-05-17 合肥工业大学 一种降低铝电解槽中水平电流的阴极结构
CN111809202B (zh) * 2020-07-22 2021-11-23 合肥工业大学 一种降低铝电解槽中铝液水平电流的阴极钢棒结构
CN113073358B (zh) * 2021-04-06 2024-03-08 李欣 一种复合阴极钢棒和阴极炭块组的结构

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US9371593B2 (en) 2012-09-11 2016-06-21 Alcoa Inc. Current collector bar apparatus, system, and method of using the same
NO20141572A1 (no) * 2014-12-23 2016-06-24 Norsk Hydro As En modifisert elektrolysecelle og en fremgangsmåte for modifisering av samme
WO2016105204A1 (fr) 2014-12-23 2016-06-30 Norsk Hydro Asa Cellule d'électrolyse modifiée et procédé permettant de modifier cette dernière
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